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Diode-pumped 10 W continuous wave cesium laser.

Boris Zhdanov1, R J Knize

  • 1Department of Physics, U.S. Air Force Academy, 2354 Fairchild Drive, Suite 2A31, USAF Academy,Colorado 80840, USA. boris.zhdanov.ctr@usafa.af.mil

Optics Letters
|August 3, 2007
PubMed
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A new cesium vapor laser achieves 10 W output power, a tenfold increase, using a continuous wave laser diode array. This highly efficient laser offers a significant advancement in alkali laser technology.

Area of Science:

  • Atomic physics
  • Laser technology
  • Optoelectronics

Background:

  • Alkali lasers, particularly cesium vapor lasers, are crucial for various applications.
  • Previous diode laser-pumped alkali lasers suffered from low output power and efficiency, often relying on pulsed systems.

Purpose of the Study:

  • To demonstrate an efficient continuous wave (CW) cesium vapor laser.
  • To significantly enhance the output power and optical efficiency of diode-pumped alkali lasers.

Main Methods:

  • Utilized a continuous wave laser diode array as the pump source.
  • Narrowed the pump source linewidth using an external cavity to precisely match the cesium absorption line.
  • Optimized the laser cavity for efficient power extraction.

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Main Results:

  • Achieved an output power of 10 W, exceeding previous results by over a factor of 10.
  • Attained a slope efficiency of 68% and an overall optical efficiency of 62%.
  • Demonstrated an optical efficiency six times higher than prior pulsed laser results for diode laser array-pumped alkali lasers.

Conclusions:

  • The developed CW cesium vapor laser represents a significant breakthrough in efficiency and power output.
  • This advancement paves the way for more practical and powerful applications of diode-pumped alkali lasers.
  • The optimized pumping scheme and cavity design are key to the high performance achieved.